WORM retention period

I've a question regarding Snaplock (Enterprise) volumes. I've discovered how to set retention dates by setting a default period on a volume level, and there's also a description on how to do it thru UNIX shell - but the CIFS protocol is not covered. It simply says "Set the retention date using the command or program available for the file access protocol"...

Does anyone have experince in working with SnapLock'd volumes or setting retention period for individual files?